{
      "tool_id": "art-25-a2a-agent-card-validator",
      "tool_version": "1.0.0",
      "display_name": "A2A Agent Card Validator & Extension Checker",
      "mcp_name": "verify_a2a_agent_card",
      "mandate_type": "compliance_control",
      "wave": "A",
      "gpu": false,
      "url": "https://ainumbers.co/chaingraph/art-25-a2a-agent-card-validator.html",
      "description": "Validates an A2A agent-card.json against the v1.0 shape: identity fields, capabilities, extensions (AP2/x402), input/output modes, skills, provider, signed-card JWS block. Branch B, node 1 of the Agentic Rail Chain. Promoted from T283.",
      "input_schema_ref": "chaingraph/art-25-a2a-agent-card-validator.html#manifest",
      "deadline": null,
      "deadline_note": "A2A v1.0 live (Linux Foundation, 2026)",
      "consumes": [
        "art-22-agentic-payments-protocol-comparator"
      ],
      "feeds": [
        "art-26-x402-payload-decoder-flow-simulator",
        "art-18-mcp-developer-readiness-scorecard",
        "ptg-01-ap2-prompt-template-generator"
      ],
      "status": "live",
      "conformance_fixtures": false,
      "compute_capability": "server",
      "compute_images": [{"system":"sha256-source","image_id":"sha256:31f05f94d1769d1602bf8a182a0c58acbc94caa2292ed294d99233f5ba0d3e1b","valid_from":"2026-07-10"},{"system":"risc0","image_id":"sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6","valid_from":"2026-06-28"}],
      "compute_proof": {
        "type": "ZkVmReceipt",
        "system": "risc0",
        "receiptFormat": "groth16-bn254",
        "imageId": "sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6",
        "seal": "Hy/MkG+Ky3W+MO75X+ZkQqMVE3bSocK/DZnggV9JvhoKhm7rY7PPHc7Wuc6/99lg8Wr9D0PnGMufphYtXJZNcAnNi7bFq157VkPCaFV7Eo6SdbR4Z3ZdX1uHTQ1hQRoRCKtGqandWPj2fh9SuamuVOYKyHmTKdRcPgv544iN3RUssrmJ1NkRsU/k4WENwWhhGk7fituIA8X+kPmoL+R1JyNLHjX3yHih1rOPBu84OOCrqBe7dRIOFFBNTO5pf99BKHoppERR3dXtZgDKggXy4uCvuhHZWwpcBK0ZS4H/EB0RTvu6SOPfJCIsPKx4bgs+uIaoVBYomAkVhcdOtTqGDA==",
        "journal": {
          "chaingraph_version": "0.4.0",
          "kernel_digest": "sha256:224604a0e6073f69216b671c693ab41c03e588e68fa8c0f397d847514654e9f4",
          "output": {
            "errors": 0,
            "findings": [
              {
                "level": "pass",
                "msg": "Core identity fields present (name, description, url, version)."
              },
              {
                "level": "pass",
                "msg": "protocolVersion = \"1.0\"."
              },
              {
                "level": "pass",
                "msg": "capabilities present (streaming=false, pushNotifications=false)."
              },
              {
                "level": "info",
                "msg": "No capabilities.extensions — declare AP2/x402 here if this agent transacts."
              },
              {
                "level": "pass",
                "msg": "1 skill(s) advertised."
              },
              {
                "level": "info",
                "msg": "Unsigned card. A2A v1.0 supports Signed Agent Cards (a \"signatures\" JWS array)."
              },
              {
                "level": "info",
                "msg": "Serve this document at /.well-known/agent-card.json for discovery."
              }
            ],
            "has_ap2_extension": false,
            "has_signed_card": false,
            "passes": 4,
            "score": 100,
            "verdict": "valid",
            "warnings": 0
          }
        }
      },
      "export_capability": [
        "xlsx",
        "csv",
        "pdf",
        "xbrl:ocg-ext"
      ]
    }